Automatic cut-off and gas-regulator



(No Model.) 2 Sheets--Sheet 1.

O. A. DALLY & H. K. RICHARDSON AUTOMATIC GUT-OFF AND GAS REGULATOR.

No. 405,830. Patented June 25, 1889.

Mfiassaa vEqTbai Geo. Hum, 532

(No Model.) 2 Sheets-Sheet 2. G. A. DALLY &-. H. K. RICHARDSON.AUTOMATIC OUT-OFF AND GAS REGULATOR.

No. 405,830. Patented June 25 1889.

HEESEER GQ-ORRWQ I UNITED STATES PATENT OFFICE.

CHARLES A. DAILY AND HARRY K. RICHARDSON, OF PITTSBURG, PENNSYLVANIA.

AUTOMATIC CUT-OFF AND GAS-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 405,830, dated June 25,1889.

Serial No. 287,577. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES A. DALLY and HARRY K. RICHARDSON, ofPittsburg, Pennsylvania, have invented a new and useful Improvement inAutomatic Cut-Offs and,

Gas-Regulators, which improvement is fully set forth in the followingspecification, reference being had to the accompanying drawings.

Similar letters of reference indicate corresponding parts.

Our invention relates to improvements in an automatic gas cut-off andregulator, which we will fully describe hereinafter.

In the drawings accompanying this specification, Figure 1 is a side viewof one of our valves or regulators, and Fig. 2 is a sectional view ofthe same.

A is the principal chamber-of our gas-regulater, which we call thehigh-pressure chamber. This chamber is separated from the inlet-chamberA by a wall A in which is an opening a Through this opening a the gaspasses into the chamber A.

a is a plug at the top of the chamber A, and a is a plug at the bottomof the chamber A. These plugs are screwed into their several places.

Inside the chamber A is an inner chamber B, in the walls of which aretwo valve-seats one at the top and one at the bottom-4n which are placedthe valves 0 and c respect ively. These valves are fixed to the shaft G,as will be seen in Fig. 2. c c and e e are gum packin gs to insuretightness of the valveseat. These valves 0 and c are seated from above,and are operated at one and the same time either in opening or closingof the same. They (valves 0 and 0 by their operation constitute chamberB a low-pressure chamber, the high pressure being from within chamber A.The chamber B is extended by the addition of the chamber B, and the twoare held together by a flange attachment 6 b, and to the port B theservice-pipes are attached,

- preferably by flange 2) b.

c is a valve at the lower end of the shaft 0.

c is a gum disk fixed to the valve 0.

D is a diaphragm-chamber secured to the chamber B by means of theflanged tube D,

the flange of the same di being secured to the tube E at its upper end,as seen in Fig. 2 at This diaphragm-ehamber D is in two sections, whichare fastened together by bolts, as seen at (1?, Fig. 2. Between thesetwo sections of the chamber D we place a flexible diaphragm d d, and onthe upper side thereof we fasten the metallic disk at for a well-knownpurpose.

E is the operating valve-rod, and at its upper end is secured to thelever E by a bolt at 6 This rod E extends from above the chamber D towithin the chamber B, and is rigidly fixed to the diaphragm (Z. At thelower end of the rod E an attachment is made to the lever e by bolt e".

E is a fulcrum, and E a weight.

E is a fulcrum for the lever e, and is fixed thereto by the bolt 6 while6 secures the lever a to the shaft C.

F represents a weighted safety-valve to the escape-pipe f f F is,another escape-pipe secured to the hood F at the top thereof. These twoescape-pipes unite near the top of the hood F, as seen in Fig. 1. Incase any gas should escape within the chamber formed by the hood F itmay pass harmlessly off through the escape-pipe F, and in case of anover gas-pressure in the chambers B and E gas may be conveyed offthrough pipes ff to the pipe F, and from thence into open air.

By reference to Fig. 2 it will be readily seen that by our system ofvalves and their operating mechanism a sure cut-off will beautomatically secured when the gas-pressure falls below the minimum inthe chamber D. This is effected by a lowering of the diaphragm d, thuscarrying down the lever c at one end and raising it at the other end,where it is secured to the shaft 0. This movement carries up the valve0" so as to shut tight the opening a thus preventing any further flow ofgas into the chamber above, and the gaspressure against the valve 0 willhold it up, or it will be held up by means of the Weight on the lever 6.hen the weight E on the lever E is properly adjusted so as to producethe desired effect in relation to the gas-pressure, there will be acomplete regulation of pipe F regulated by the cock f gas-pressurethereafter. This will be apparent to those who understand this branch ofmechanics on a close inspection of Fig. 2. By using the two valves 0 andc the high pressure downward on the upper one 0 and upward on the otherone 0 it will be seen that an equal pressure either way will bemaintained no matter how high the pressure may be of the gas through theopening a This is one of the main features of our invention to whichspecial attention is called. Byremoving the plugs a and a access can behad to regulate or repair the valves 0, c and c and for any othernecessary purpose. As the ports 0 and c are wing-shaped, the gas willreadily pass the same from the chambers A and A into' the chamber B.

After there has been a complete cut off of gas by closing valve 0 and itis desired to again start the flow of the same into chamber A, somedifiiculty may at times be experienced by reason of a very high pressureon valve 0 so that some considerable difficulty may be experienced inopening the latter named valve. We obviate this difficulty by means ofconveying a flow of the gas out of the chamber A and into chamber A bymeans of the In this way a balance-pressure will be effected, as thevalves 0 and czwill be open through to chambers B B and D to thediaphragm cl.

Having thus described our invention,what we claim, and desire to secureby Letters Patent, is

In an automatic pressure-regulator and cutoff, the combination of theisolated high and low pressure chambers, a vertically-movable valve-stemoperating in the low-pressure chamber and having the valves 0 0 adaptedto open and close the ports between said cham bers, an outlet-chambercommunicating with the lowpressure chamber, a diaphragm-chambercommunicating with the exit-chamber, a diaphragm, connectionsintermediate of the valve-rod and diaphragm, a hood F fixed to thediaphragm-chamber, an escape-pipe F, leading from said hood, and a pipef, communicating with the outlet-chamber and the escape-pipe and havingan automatic valve F, substantially as described.

In testimony that we claim the foregoing as our invention we hereto setour hands in the presence of two witnesses.

